The method: how the receipt gets made.

Search first, then assess the evidence. Read the recorded source links, excerpts and limitations to understand the result and check its context.

The pipeline, in plain English
Both sides of the questionYour claim becomes several search queries, aimed FOR it and AGAINST it.
Retrieved sourcesSources can include papers, official records and other web material. Check their identity, wording and context.
The recorded outcomeRead the stored verdict and explanation, including partial evidence, insufficient evidence or no published result.
Read the limitationsSome responses state that confidence is unavailable. A displayed score is not a calibrated probability, and source counts are not evidence weights.
Evidence excerptsCompare quoted material with the original source. An excerpt alone does not establish support for the claim.
Retraction informationRetraction scans look up recorded DOIs in OpenAlex. They do not cover every source or guarantee an overnight update.

Check the receipt's available recorded history for updates. Sign in to submit a counter-source for manual review; submission does not automatically re-run the engine. 22,565 receipts minted so far.

The legend

Reading the recorded labels.

Labels depend on the response type and historical receipt version. Read the stored result, its explanation and source context together. A check does not guarantee a public receipt.

SUPPORTED

The stored judgment reports support for the claim. Inspect the evidence, the exact wording it supports and any limitations; the label is not a permanent guarantee.

CONTESTED

The stored judgment reports evidence on both sides. Read which parts support or contradict the claim. Disagreement alone does not establish this outcome.

REFUTED

The stored judgment reports evidence against the claim. This differs from finding too little evidence to decide; inspect the recorded counterevidence.

INSUFFICIENT EVIDENCE

The result does not establish a supported, refuted or contested judgment. Read its status and explanation: an evidence shortfall, a hold and a technical failure are different, and not every response has a public receipt.

COMMON KNOWLEDGE

A historical label for a claim treated as not needing a citation. It does not promise this outcome for future checks or establish the absence of recorded sources.

Partial evidence and other recorded outcomes

CONTESTED PARTIAL: partial evidence on both sides, without a settled full judgment. INSUFFICIENT LEANING: partial evidence leans one way without settling the claim.

INCONCLUSIVE: no evidence was retrieved for a judgment; this is not proof no evidence exists. A held, waiting or failed check is not a published verdict. Read its returned status.

Historical receipts may also use OVERSTATED, with a narrower supported claim; IMPRECISE (shown as NOT QUITE), with a differing recorded figure; TOO EARLY TO TELL, for an unsettled record; or NO RECORD, where words could not be located. These labels and their supporting details are preserved when recorded.

On a citation, you may also see
STRONG

A strong citation result in this response format. Inspect the source and explanation before using it; this label is not independent citation verification.

DECENT

A historical citation rating indicating an inferential support step. Check whether that step preserves your claim's wording and scope.

WEAK

A limited citation result. In some response versions, partial claim outcomes map here; the accompanying note carries the distinction.

Citation labels and claim verdicts are different response formats. NONE means no usable citation result in that format; read the status and note to understand why. Inspect the source identity and any quotation rather than treating the label as proof.

When a historical receipt includes a lean
A lean describes the record held for that receipt, not a probability about the world. It is shown only when it was recorded. New checks do not necessarily include a lean or curve, and an absent lean must not be inferred from source counts. Historical descriptions can include:
strongly leans supportedleans supported evenly splitleans refutedstrongly leans refuted
Published accuracy →
Read the historical evaluation report, its recorded date and the limits of each metric. These figures do not qualify the current release or guarantee that an individual source supports your claim.